<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container"> 
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
		  <!-- 商品价格 -->
		  <view class="price">￥{{goods_info.goods_price}}</view>
		  <!-- 信息主体区域 -->
		  <view class="goods-info-body">
		    <!-- 商品名称 -->
		    <view class="goods-name">{{goods_info.goods_name}}</view>
		    <!-- 收藏 -->
		    <view class="favi" >          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>
		
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航组件区域 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
		</view>
	</view>
  </view>
</template>

<script>
	import { mapState ,mapMutations , mapGetters } from 'vuex'
	
	export default {
		computed : {
			...mapState('m_cart' , []),
			...mapGetters('m_cart',['total'])
		},
		
		watch: {
		// 	total(newVal) {
		// 		const findResult = this.options.find(x => x.text === '购物车')
		// 		if (findResult) {
		// 			findResult.info = newVal
		// 		}
		// 	},
  		total: {
  			handler(newVal) {
  				const findResult = this.options.find(x => x.text === '购物车')
  				if (findResult) {
  			     findResult.info = newVal
  				}
  			},
  			immediate: true
  		}
  	},
		data() {
			return {
				goods_info: {},
				options: [{
          icon: 'shop',
          text: '店铺',
          infoBackgroundColor: '#00aaff',
          infoColor: "fff"
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#00aaff',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      };
    },
		onLoad(options) {
			// 获取商品id
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		methods: {
			// 把 m_cart 模块中的 addToCart 方法映射到当前页面使用
			 ...mapMutations('m_cart', ['addToCart']),
			//定义请求商品详情数据的方法
			async getGoodsDetail(goods_id) {
			  const {data : res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id : goods_id})
				if (res.meta.status !== 200) return uni.$showMsg()
				//为goods_info赋值
				
				// 使用字符串的 replace() 方法，为 img 标签添加行内的 style 样式，从而解决图片底部空白间隙的问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g, '<img style = "display:block;"')
				// 解决图片无法显示问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/webp/g, 'jpg')
				this.goods_info = res.message
				
		  },
			preview(i) {
				uni.previewImage({
					//预览时，默认显示图片的索引
					current: i,
					// 所有图片 url 地址的数组
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			onClick(e) {
				if(e.content.text === '购物车') {
					uni.switchTab({
						url:'/pages/cart/cart'
					})
				}
			},
			buttonClick(e) {
       if (e.content.text === '加入购物车') {
         // 组织商品的信息对象
         // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
         const goods = {
           goods_id: this.goods_info.goods_id,// 商品的Id
           goods_name: this.goods_info.goods_name,// 商品的名称
           goods_price: this.goods_info.goods_price,// 商品的价格
           goods_count: 1,// 商品的数量
           goods_small_logo: this.goods_info.goods_small_logo,// 商品的图片
           goods_state: true// 商品的勾选状态
         }
         // 调用 addToCart 方法
         this.addToCart(goods)
       }
     }
   }
 }
</script>

<style lang="scss">
	swiper{
		height: 750rpx;
		image{
			width: 100%;
			height: 100%;
		}
	}
	
	.goods-info-box {
		padding:10px;
		padding-right: 0px;
		.price{
			color: #c00000;
			font-size: 18px;
			padding: 10px 0;
		}
		.goods-info-body{
			display: flex;
			justify-content: space-between;
			
			.goods-name{
				font-size: 13px;
				padding-right: 10px;
			}
			.favi{
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				border-left: 1px solid grey;
				color: gray;
			}
		}
	}
	.yf{
		margin: 10px 0;
		font-size: 12px;
		color: gray;
	}
	
	.goods_nav {
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
	
	.goods-detail-container {
		padding-bottom: 50px ;
	}

</style>
